From 42e03b0d371a61478ac6fd992bb4183bdccb3028 Mon Sep 17 00:00:00 2001 From: Thomas Haemmerle Date: Mon, 19 Feb 2024 14:11:14 +0100 Subject: iio: temperature: tmp117: add support for vcc-supply Add support to specify the VCC supply which is required to power the device. According the datasheet 7.3.1 Power Up, the device needs 1.5ms after the supply voltage reaches the operating range before the communcation can begin. Signed-off-by: Thomas Haemmerle Signed-off-by: Marco Felsch Link: https://lore.kernel.org/r/20240219131114.134607-2-m.felsch@pengutronix.de Signed-off-by: Jonathan Cameron --- drivers/iio/temperature/tmp117.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/iio') diff --git a/drivers/iio/temperature/tmp117.c b/drivers/iio/temperature/tmp117.c index 059953015ae7..8972083d903a 100644 --- a/drivers/iio/temperature/tmp117.c +++ b/drivers/iio/temperature/tmp117.c @@ -9,6 +9,7 @@ * Note: This driver assumes that the sensor has been calibrated beforehand. */ +#include #include #include #include @@ -17,6 +18,7 @@ #include #include #include +#include #include @@ -148,10 +150,17 @@ static int tmp117_probe(struct i2c_client *client) struct tmp117_data *data; struct iio_dev *indio_dev; int dev_id; + int ret; if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA)) return -EOPNOTSUPP; + ret = devm_regulator_get_enable(&client->dev, "vcc"); + if (ret) + return ret; + + fsleep(1500); + dev_id = i2c_smbus_read_word_swapped(client, TMP117_REG_DEVICE_ID); if (dev_id < 0) return dev_id; -- cgit v1.2.3